scholarly journals The Influence of Electro-Conductive Compression Knits Wearing Conditions on Heating Characteristics

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6780
Author(s):  
Md. Reazuddin Repon ◽  
Ginta Laureckiene ◽  
Daiva Mikucioniene
Keyword(s):  
Heat Generation ◽  
Chemical Interaction ◽  
Morphological Changes ◽  
Surface Damage ◽  
Electrically Conductive ◽  
Conductive Yarns ◽  
Generating Capacity ◽  
Rib Structure ◽  
Knitted Structure ◽  
Conductive Yarn

Textile-based heaters have opened new opportunities for next-generation smart heating devices. This experiment presents electrically conductive textiles for heat generation in orthopaedic compression supports. The main goal was to investigate the influence of frequent washing and stretching on heat generation durability of constructed compression knitted structures. The silver coated polyamide yarns were used to knit a half-Milano rib structure containing elastomeric inlay-yarn. Dimensional stability of the knitted fabric and morphological changes of the silver coated electro-conductive yarns were investigated during every wash cycle. The results revealed that temperature becomes stable within two minutes for all investigated fabrics. The heat generation was found to be dependent on the stretching, mostly due to the changing surface area; and it should be considered during the development of heated compression knits. Washing negatively influences the heat-generating capacity on the fabric due to the surface damage caused by the mechanical and chemical interaction during washing. The higher number of silver-coated filaments in the electro-conductive yarn and the knitted structure, protecting the electro-conductive yarn from mechanical abrasion, may ensure higher durability of heating characteristics.

scholarly journals Effect of Stretching on Thermal Behaviour of Electro-Conductive Weft-Knitted Composite Fabrics

Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 249
Author(s):  
Md. Reazuddin Repon ◽  
Ginta Laureckiene ◽  
Daiva Mikucioniene
Keyword(s):  
Heat Generation ◽  
Research Work ◽  
Sem Images ◽  
Fabric Structure ◽  
Highly Sensitive ◽  
Multifilament Yarns ◽  
Knitted Structure ◽  
Composite Fabrics ◽  
Different Levels ◽  
Conductive Yarn

This experiment presents a study carried out on the electric charge passing textiles for heat production in compression weft-knitted composite fabrics used for medical purposes. The aim was to flourish compression support of knitted structure with integrated highly sensitive metal (silver) coated polyamide multifilament yarns and to evaluate its heat origination attributes after stretching in different levels as well as changes of the temperature during the time. A flat double needle-bed knitting machine was utilized to fabricate the selected specimens together with elastomeric inlay-yarn incorporated into the structure for compression generation and silver coated polyamide yarn laid as ground yarn in a plated structure for heat generation. Six different variants depending on the metal coated yarn amount used and the fabric structure along with two types of the conductive yarn linear density were fabricated for this research work. Scanning electron microscope (SEM) images were preoccupied to show the morphology of conductive yarn and thermal pictures were captured to study the evenness of the heat over the surface of composite fabrics depending on conductive yarn distribution in the pattern repeat. The temperature profile of fabricated composite fabrics and comparison of the heat generation by specimens after stretching in different levels was studied.

scholarly journals Development of a Carbon Fiber Knitted Capacitive Touch Sensor

MRS Advances ◽  
2016 ◽  
Vol 1 (38) ◽  
pp. 2641-2651 ◽  
Author(s):  
Richard Vallett ◽  
Ryan Young ◽  
Chelsea Knittel ◽  
Youngmoo Kim ◽  
Genevieve Dion
Keyword(s):  
Human Machine Interaction ◽  
Electrically Conductive ◽  
Touch Sensor ◽  
Medical Textiles ◽  
Conductive Yarns ◽  
Embedded Electronics ◽  
Smart Garments ◽  
Knitted Structure ◽  
Fabric Surface ◽  
Machine Interaction

ABSTRACTTextiles, in combination with advances in materials and design, offer exciting new possibilities for human and environmental interaction, including biometric and touch-based sensing. Previous fabric-based or flexible touch sensors have generally required a large number of sensing electrodes positioned in a dense XY grid configuration and a multitude of wires. This paper investigates the design and manufacturing of a planar (two-dimensional, XY location) touch fabric sensor with only two electrodes (wires) to sense both planar touch and pressure, making it ideal for applications with limited space/complexity for wiring. The proposed knitted structure incorporates a supplementary method of sensing to detect human touch on the fabric surface, which offers advantages over previous methods of touch localization through an efficient use of wire connections and sensing materials. This structure is easily manufactured as a single component utilizing flatbed knitting techniques and electrically conductive yarns. The design requires no embedded electronics or solid components in the fabric, which allows the sensor to be flexible and resilient. This paper discusses the design, fabrication, sensing methods, and applications of the fabric sensor in robotics and human-machine interaction, smart garments, and wearables, as well as the highly transdisciplinary approach pursued in developing medical textiles and flexible embedded sensors.

scholarly journals Ag Coated Pa-Based Electro-Conductive Knitted Fabrics for Heat Generation in Compression Supports

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Md. Reazuddin Repon ◽  
Daiva Mikučionienė ◽  
Ilze Baltina ◽  
Juris Blūms ◽  
Ginta Laureckiene
Keyword(s):  
Heat Generation ◽  
Linear Density ◽  
Knitted Fabrics ◽  
Electrically Conductive ◽  
Temperature Changes ◽  
Conductive Yarns

AbstractThis work deals with the electrically conductive textiles for heat generation in orthopedic compression supports. This study aimed to develop compression knitted structures with integrated electro-conductive yarns and investigate their heat generation characteristics and temperature changes during the time and under stretch which is required to generate compression. Combined half-Milano rib structured knitted fabrics were made by using silver (Ag) coated PA yarn of linear density of 66 tex and 235 tex, respectively. Six variants of specimens were developed by using different amount of electro-conductive yarns in a pattern repeat. It was found that stretch negatively influences temperature values as well as time in which the required temperature is reached. Therefore, the final wearing conditions have to be summed up during the designing of compression orthopedic heated supports.

scholarly journals The Impact of Elongation on Change in Electrical Resistance of Electrically Conductive Yarns Woven into Fabric

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3390
Author(s):  
Željko Knezić ◽  
Željko Penava ◽  
Diana Šimić Penava ◽  
Dubravko Rogale
Keyword(s):  
Mathematical Model ◽  
Electrical Resistance ◽  
Electrically Conductive ◽  
Textile Materials ◽  
Measurement Results ◽  
Conductive Yarns ◽  
Yarn Count ◽  
As Relationship ◽  
The Impact ◽  
The Mathematical Model

Electrically conductive yarns (ECYs) are gaining increasing applications in woven textile materials, especially in woven sensors suitable for incorporation into clothing. In this paper, the effect of the yarn count of ECYs woven into fabric on values of electrical resistance is analyzed. We also observe how the direction of action of elongation force, considering the position of the woven ECY, effects the change in the electrical resistance of the electrically conductive fabric. The measurements were performed on nine different samples of fabric in a plain weave, into which were woven ECYs with three different yarn counts and three different directions. Relationship curves between values of elongation forces and elongation to break, as well as relationship curves between values of electrical resistance of fabrics with ECYs and elongation, were experimentally obtained. An analytical mathematical model was also established, and analysis was conducted, which determined the models of function of connection between force and elongation, and between electrical resistance and elongation. The connection between the measurement results and the mathematical model was confirmed. The connection between the mathematical model and the experimental results enables the design of ECY properties in woven materials, especially textile force and elongation sensors.

scholarly journals Tip-Cylinder Electrode Plasma to Enhance the Coating of Conductive Yarn Process

2020 ◽  
Vol 14 (2) ◽  
pp. 213
Author(s):  
Valentinus Galih Vidia Putra ◽  
Lutfi Zulfikar ◽  
Atin Sumihartanti ◽  
Juliany Ningsih Mohamad ◽  
Yusril Yusuf
Keyword(s):  
Electrical Conductivity ◽  
Plasma Treatment ◽  
Plasma Generator ◽  
Textile Yarn ◽  
Textile Materials ◽  
Conductive Yarns ◽  
Coating Method ◽  
Pre Treatment ◽  
Conductive Textile ◽  
Conductive Yarn

This study aims to develop conductive textile materials using a polyester textile yarn by applying a knife coating method and pre-treatment of a tip-cylinder plasma electrode. In this research, carbon ink was coated on polyester staple yarn which was given a pre-treatment with a plasma generator and coated with the knife coating method. The electrical conductivity of conductive yarns produced from this study was divided into two types, as yarns without plasma treatment and with plasma treatment with a ratio of water and carbon ink concentrations of 1:1 and 2:1. The results of the electrical conductivity with plasma treatment and the concentration of carbon ink and water of 1:1 and 1:2 were 69005 (Ωm)-1 and 50144.25 (Ωm)-1, respectively, while the results of the electrical conductivity for threads with concentrations of carbon ink and water of 1:1 and 1:2 without plasma treatment were 18197.64 (Ωm)­‑1  and 8873.54 (Ωm)-1, respectively. The results showed that the concentration of carbon ink and water and plasma treatment affected the conductive value of the yarn. The results also showed that the presence of plasma pre-treatment improved the coating process of conductive ink on the yarn.Keywords: carbon ink; conductive yarn; plasma; textile A B S T R A KPenelitian ini bertujuan untuk mengembangkan bahan tekstil konduktif menggunakan benang tekstil poliester dengan mengaplikasikan metode knife coating dan pre-treatment plasma elektroda tip-cylinder. Pada penelitian ini dilakukan pelapisan dengan tinta karbon pada benang poliester stapel yang diberi perlakuan awal dengan plasma generator dan dilapisi dengan metode pelapisan knife coating. Konduktivitas listrik benang konduktif yang dihasilkan dari penelitian ini dibagi menjadi dua jenis, yaitu benang tanpa perlakuan plasma dan dengan perlakuan plasma dengan perbandingan konsentrasi air dan tinta karbon sebesar 1:1 dan 2:1. Hasil konduktivitas listrik dengan perlakuan plasma dan konsentrasi tinta karbon dan air sebesar 1:1 dan 1:2 masing-masing adalah 69005 (Ωm)‑1 dan 50144,25 (Ωm)-1, sedangkan hasil konduktivitas listrik untuk benang dengan konsentrasi tinta karbon dan air sebesar 1:1 dan 1:2 tanpa perlakuan plasma masing-masing adalah 18197,64 (Ωm)-1 dan 8873,54 (Ωm)-1. Hasil penelitian menunjukkan bahwa konsentrasi tinta karbon dan air serta perlakuan plasma berpengaruh terhadap nilai konduktivitas benang serta adanya pre-treatment plasma dapat meningkatkan proses coating tinta konduktif pada benang.Kata kunci: benang konduktif; plasma; tekstil; tinta karbon 

A Novel Solution of Monitoring Incontinence Status by Conductive Yarn and Advanced Seamless Knitting Techniques

2012 ◽  
Vol 7 (4) ◽  
pp. 155892501200700 ◽  
Author(s):  
Rong Liu ◽  
Shuxiao Wang ◽  
Terence T. Lao
Keyword(s):  
Care Provider ◽  
Electrical Resistance ◽  
Conductive Yarns ◽  
Wet Processing ◽  
Potential Applications ◽  
Stable Performance ◽  
Seamless Knitting ◽  
Intelligent Healthcare ◽  
Conductive Yarn ◽  
Product Dimension

This paper presents a novel solution for monitoring incontinence status through the design and development of the intelligent incontinence pants by the use of conductive yarns and incorporating advanced circular seamless knitting technology. The produced textile incorporates wire and electrodes by conductive yarn working with a siren system which can monitor, sense and alert the wearer and care provider on the incontinence status in real time so as to reduce the need for manual checking and minimize patient care workload. The engineered stitches, yarn materials, and unique seamless knitting techniques provide soft handling, special fabric mechanisms, and tactile comfort of the resulting product. The electrical resistance of knitted conductive yarn demonstrated a stable performance in wet processing. Fitting body trials were conducted to estimate product dimension and configuration. This study allows us to explore further the potential applications of conductive yarn and seamless knitting technology in bio-functional and intelligent healthcare products and solutions through integrating multidisciplinary knowledge and techniques.

Core Conductive Yarn Based Integral Knitted ESD Garments Part II. Carbon Composite Yarns Investigation

2013 ◽  
Vol 772 ◽  
pp. 474-479 ◽  
Author(s):  
Codrin Donciu
Keyword(s):  
Decay Time ◽  
Electrostatic Discharge ◽  
Volume Resistivity ◽  
Carbon Composite ◽  
Surface Resistivity ◽  
Charge Decay ◽  
Knitted Structure ◽  
Conductive Yarn ◽  
Carbon Based

A research regarding integral knitted structures for electrostatic discharge (ESD) protective garments with core conductive fibres is currently undergoing. In this paper, the second part of the research is presented, in which the integral knitted structures with carbon-based fibres were investigated. A number of 8 samples were manufactured and their ESD properties were analyzed. In this regard, the surface resistivity, volume resistivity, and charge decay time were determined, and based on the results, a bilayer knitted structure was proposed.

Electrically Conductive Fibers/Yarns with Sensing Behavior from PVA and Carbon Black

2011 ◽  
Vol 462-463 ◽  
pp. 18-23 ◽  
Author(s):  
P. Xue ◽  
Xiao Ming Tao ◽  
Keun Hoo Park
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Morphological Characteristics ◽  
Processing Technique ◽  
Wet Spinning ◽  
Coating Process ◽  
Textile Processing ◽  
Electrically Conductive ◽  
Conductive Yarns ◽  
Conductive Fibers

In this study, electrical conductive yarns were prepared by wet-spinning technique and a physically coating process. Carbon black (CB) was used to make the fiber gaining electrical conductivity. The electrical conductivity and morphological characteristics of the developed conductive fibres were studied and compared. The results show that linear resistivity of the produced conductive yarns ranges from 1 to a few hundred kΩ per centimeter, mainly depending on processing technique and substrate fibers. It is also shown that the physically coating processes will not significantly affect the mechanical properties of the fibers and yarns. These conductive yarns are lightweight, durable, flexible, and cost competitive; and able to be crimped and subjected to textile processing without any difficulty.

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